Elevator safety device.



F. J. CROUCH 6; H. E; LLOYD ELEVATOR SAFETY DEVICE. APPLICATION FILEDSEPT. 9,.1910! Patented Apr. 25, 1911.

nventors Attorneys.

I view through" a cured,

FRANK J. QRO'UGH AND HULDIA- E. LLOYD, OF

SEATTLE, wesmno'ron.

ELEVATOR sArEry .nnvxcu.

' Specification of Letters Patent. P t nted Apr. 25, 1911.

Application filed September 9, 1910. Serial No. 581,230.

To all whom it may conccrn'i. Be it known that we, FRANK J. CROUCH andHULDIA E. LLOYD, citizens of the United States, residing at Seattle,inthe county of King, State of Washington, have invented a new anduseful Elevator Safety Device, of which the followTng is aspecification.-

It is the object of this invention toprovide a novel form of doorcontrolled means for making and breaking an electrical circuit, in whichis Iocated'the motor whereby an elevator car isactuated." j

This invention embodies the door-locking means, set forth, shown-iir'thc drawings and claimed in a co-pending application filed the 9thday of September, 1910, Serial No.

' have a smooth surface to play against, when In the drawings however,there is only disclosed one particular form of the inven: tion, but inpractical fields this form may require slight alterations, to which theapplicant is entitled, provided the alterations are comprehended in theappended claims.

Other features and combinations of parts will hereinafter be set forth,shown in the drawings, and claimed.

In the drawings, Figure 1 is. a sectional art of an elevator shaft andshowing a switch for making and breaking a circuit and door-releasingmeans, and a door locking mechanism. Fig. '2 is a detail view showin theswitch mechanism for making and breaking the said circuit in openposition, with the door releasing means out of contact with the memberfor actuating the switch. Fig. 3 is an enlarged detail view of thedoor-locking means, which is arrang at the bottom of the car door andthe shaft door opening.

Referring to the drawings, 1 denotes an elevator shaft, while 2represents a landing. Opening fromthe elevatorshaft upon the landing 2is a door way 3, closed'by a door 4. The door 4' is suspended from thetrack 5 by hangers 6 and pulleys 7.

Adjacent the landing 2, a bracket is sebetween the ears 9 of which, upona in 10, a latch member 11 is pivoted. The ower end ofthe latch member11 is curved or arched outwardly, in order to provide an engagingsurface 12. The upper end 13 of the latch member is received in a recess14,

' in a keeper plate 15. This plate 15 is secured to the door 4 anexamination of the drawings, it will be understood that as the door 4 isclosed, the

ed indicated at 31.

as shown at 16. Upon end 13 of the latch member will fall into therecess 14 of the kee er plate. This end 13 can only be removed rom therecess, when the sills of the car and the shaft door opening are in thesame plane, s shown in dotted lines in Fig. 3. The la h member whenactuated, will assume the-,position as shown in dotted lines in Fig. 3.To throw the latch member back 'to its normal position,

when the door 4 is closed, a spring 17 1s arranged between the lowercurved part ofthe latch member and the end of the flooring of thelanding 2. The keeper plate is embedded in the door 4, and the screws 16are countersunk in the said plate so that as the door 4 is closed, theend 13 of the latch member will approaching the recess 14 of the plate.The car 18 is-provided at its lower part with a member 19, whichcomprises a vertical part 20, and a lower arched portion 21. This archedportion 21 co-acts with the surface 12 of the latch member, in order tothrow the end 13 out of said recess 14.

The door 4 is provided with a door releasing means, comprising a latchbar 24, fulcrumed at 25, to a sleeve 26 secured to a rod 27,, whichextends transversely of the door 4, and is secured thereto, as shown at28.

Thid bar 24 is adapted when the door is in a closed position, to extendthrough an opening 29 in the shaft 1." The extremity of the bar 24 isformed with a shoulder 30, which prevents the door from being opened,unless the bar .24' is slightly raised, the shoulder coming in contactwith The door 4 can only be opened when the latch bar 24 is lifted.

The extreme end 32 of the bar 24 remains constantly in contact with areleasing lever 33, which is pivoted at 34 to a bracket 35. This bracket35 is secured as at 36, to the side of theelevator shaft. .When theoutstanding end 37 of the lever 33 is swung in the direction indicatedby the arrow 38, the bell-crank switch member 39 is closed. This switchmember 39 is fulcrumed at.40 to a 'terminal41 upon a base 42, while thefree end of the member cooperates with a terminal 43 upon said base. Thelower angled end of the switch member 39, is secured to a spring 44,connected tothe bracket 34: The purpose of this spring is to withdrawthe free end of the switch from contact with the terminal 43, when thepressure of the latch bar 24 on the lever 33 is relieved from the theelevator shaft as free end of said switch member. Connected to theterminal 41 is a conductor 45, While connected to the terminal 43 is aconductor These conductors are in circuit with a motor (not shown)",-for elevating or lowering the car.

' Presupposing that the parts are positioned as shown in Fig. 2, the-door 4 being partly open, it will be seen that the extremity of thelatchbar 24 is withdrawn from the lever 33, the lever 33 tilting out ofengagement with the bell crank 39, the upper end of the bell crank beingtilted out of engagement with the terminal 43, through the action of thespring 44. .The circuit through the motor will thus be broken, and theelevator car cannot be moved until the door 4 is closed, whereupon, 1the parts being disposed as shown in Fig. 1, the bell crank 39 willunite the terminals 41 and 43, thus completing the circuit through" themotor.

The invention having been described, what is claimed as new and usefulis:

In a device of the class described, a basev adapted to be mounted in anelevator shaft and ,provided with terminals for the reception of.electric conductors; abell crank fulcrumed upon one terminal and havingone of its arms positioned to engage the other terminal; a bracketfixedly supported below the-base; a 'lever fulcrumed upon the bracketand positioned to engage said arm of the bell crank; a spring unitingthe bracket and the other arm of the bell-crank to maintain the firstnamed arm normally ,out of engagement with said other terminal; and alatch adapted for mounting upon a landing door and movable with the doorto engage the lever.

In testimony that we claim the foregoing as our own, we have heretoaflixed our signatures in the presence of two Witnesses.

FRANK J. CROUCH. HULDIA E. LLOYD.

Witnesses:

H. A. P. MYERS, IDA CHRISTY.

